[PDF] ggplot2 tutorial

How do you make a plot in ggplot2?

To create a line graph with ggplot (), we use the geom_line () function. A geom is the name for the specific shape that we want to use to visualize the data. All of the functions that are used to draw these shapes have geom in front of them. geom_line () creates a line graph, geom_point () creates a scatter plot, and so on.

What are the benefits of using ggplot2?

The advantage to doing things in script ( library (ggplot2)) is that loading a package can be saved at the top of the script and easily run every time you run a script. Clicking cannot be saved, and must be done manually every time.

How do you install ggplot2?

Let’s start by installing the ggplot2 package by calling install.packages (“ggplot2”) Now we need to load the package by using the library () function. We’ll be working with the “Birth_weight” data-set which is a part of “statisticalModeling” package. Thus, we have to intstall and load this package too.

How do you create a bar chart using ggplot2?

When you want to create a bar plot in ggplot2 you might have two different types of data sets: when a variable represents the categories and other the count for each category and when you have all the occurrences of a categorical variable, so you want to count how many occurrences exist for each group.